Positioning & Measurement Stream - NZ Vertical Datum 2016
Case Study 3
GNSS for Machine Control
NZVD2016 is New Zealand’s official height system. It allows for the consistent collection and seamless exchange of heights across New Zealand. Heights used in GIS, infrastructure, planning, consents and works can now be nationally standardised.
GNSS on earthmoving machines are now commonplace in the New Zealand working environment.
One of the challenges that New Zealand Machine control customers face is the multitude of datums that exist in New Zealand. As machines are shipped between sites it is vital that the data and configurations of the machine are in terms of the site Datum.
Vertical Datum 2016 - Helping the process
When a Machine arrives on-site, the “site localization” files are added to the machine so the machine can work in terms of the local datum. As Vertical Datum 16 models the geoid, the use of this datum on a machine means operators will:
Not have to change the vertical datum they are operating in no matter where they are working in the country
The Datum models the difference between GNSS heights and that of traditional levelling (orthometric heights). Therefore by using Vertical Datum 16 they will have the machine working with orthometric heights which are aligned to gravity. Therefore there should be no discrepancy (other than that of the GNSS accuracy) between what the machine measures and what traditional levelling would show.
Vertical Datum 2016 - Benefits for machine control
Easier to manage 1 vertical datum than a multitude of National and local levelling datums
Heights will be in terms of traditional levelling
Less likely to be errors and therefore machinery more productive and efficient.
Want to know more?
Contact the Survey and Spatial New Zealand Positioning and Measurement Stream: